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 2-stroke rings
 Main types of rings: Staight faced, "L" shaped, Barelled, Half Keystone
Main options: Side notch, Internal notch, Inside edges chamfered, Peripheral edges chamfered, Chromium platted
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Nomenclature of a piston ring
| d1 |
h1 |
da1 |
s1 |
| Nominal diameter |
Axial height |
Radial thickness |
Cutting gap |
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 Technical Approach
In general, the ring is inserted in a groove incorporated in the piston
and presses against the cylinder. It fulfils a sealing function between
the pressurised and non-pressurised volumes and may also comprise a
cylinder oil wiper.
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Edges and lips
Ring materials
Main types of rings
Ring characteristics